package com.youwu.weather.util;

import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;
import org.springframework.util.ResourceUtils;

import java.io.*;
import java.util.ArrayList;
import java.util.List;

public class ReadExcel {

    public static void main(String[] args) {
        // 此处为我创建Excel路径：E:/zhanhj/studysrc/jxl下
//        File file = new File("excel/city.xlsx");
        File file = null;
        try {
            file = ResourceUtils.getFile("classpath:static/excel/city.xls");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        List excelList = ReadExcel.readExcel(file);
        System.out.println("list中的数据打印出来");
        for (int i = 0; i < excelList.size(); i++) {
            List list = (List) excelList.get(i);
            for (int j = 0; j < list.size(); j++) {
                System.out.print(list.get(j) + " ");
            }
            System.out.println();
        }

    }

    // 去读Excel的方法readExcel，该方法的入口参数为一个File对象
    public static List readExcel(File file) {
        try {
            // 创建输入流，读取Excel
            InputStream is = new FileInputStream(file.getAbsolutePath());
            // jxl提供的Workbook类
            Workbook wb = Workbook.getWorkbook(is);
            // Excel的页签数量
            int sheet_size = wb.getNumberOfSheets();
            for (int index = 0; index < sheet_size; index++) {
                List<List> outerList = new ArrayList<List>();
                // 每个页签创建一个Sheet对象
                Sheet sheet = wb.getSheet(index);
                // sheet.getRows()返回该页的总行数
                for (int i = 0; i < sheet.getRows(); i++) {
                    List innerList = new ArrayList();
                    // sheet.getColumns()返回该页的总列数
                    for (int j = 0; j < sheet.getColumns(); j++) {
                        String cellinfo = sheet.getCell(j, i).getContents();
                        if (cellinfo.isEmpty()) {
                            continue;
                        }
                        innerList.add(cellinfo);
//                        System.out.print(cellinfo);
                    }
                    outerList.add(i, innerList);
//                    System.out.println();
                }
                return outerList;
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (BiffException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}
